/Engine/Source/Runtime/CoreUObject/Public/UObject/ObjectHandleTracking.h
Callback notifying when an object was loaded through an object handle. Will not notify you about global object loads, just ones that occur as the byproduct of resolving an ObjectHandle.
typedef [TFunction](API\Runtime\Core\GenericPlatform\TFunction)< void(const [FObjectRef](API\Runtime\CoreUObject\UObject\FObjectRef) &SourceRef, [UPackage](API\Runtime\CoreUObject\UObject\UPackage) *ObjectPackage, [UObject](API\Runtime\CoreUObject\UObject\UObject) *Object)> FObjectHandleReferenceLoadedFunc